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May 31; 1921.

G. K. v; JOHANSON GAS METER Original Filed Sept. 2. 1919 6. K, V JO/wlriS-Oh lKV'eNTUR 2 M 3 W F416 I nectedwith, the- Reissued :May 31, 1927.

T The invention relates to a diaphragm-gas meter provided with two measnring cha nbers and with valves which by" the diaphragm through the action "of a spring are i 5 instantaneously reversed, the said sprin be; r ingvpr'ovicled between the swingingfen sj 'of vtwo turning'levers; the one of which is'c'ondiaphragm and the other with thefvalves; Gas meters of this type hitherto known havethe disadvantage, that the" resistance of thes'pri'n against the "movements f the diaphragmvc' angesf'with'in a .wide margin, "pressure in the'pipes connected t theimefter and conseqnently alsoupon' the lights. becornesjuneve'n. j 1' p ie oh'ect of this'inve'ntion is to remove disadvantage, the prin'cipal feature tlie said I oft-thee invention-being thattwolevers one v actuating the valves cross one another and are' connected. by a spring It is thereby attained, that the eifectof thejspring does not change 'a'pprecialol'yv during; the movement of the diaphragm but in vthe contrary its tension remains ,as even as possible, so that practicallyalso the resistan'c'erja" ainst the move "ntislof the diaphragm an fc'onse ne'ntly thelg'as pressure upon the lights wi .remainuniforrn. In the accompanying drawing an l embed? ment of tl iefinvention is, shown" by way- 0 exampIe.fFig.;1;

gas meter according to the vinventiorn and 2 shows'arplan'view of "the meterfwith v theu'pper pa ition'of-thecasingj nd the diaphragm removed. "Fi sgaan 4, are details Fig 3 showing ne ation-eff} evalva'and located in a common casing 3. The two measuringcha-mbers are separated by a partitionwhich consists of a flexible diaphragm 4 0f gas-tight material, The gasinlet fi'opens,v into a chambe 6 beneath the bottom of the casing, he communication ofsaid chamber with the two measuring chambers land 2 being controlled by two inlet valves 7 and 8, respectively, whereas the gas outlet 9. leads from another similar chamberlO, the com v munication of which with the measuring snow vrmmmr masses, ronfnrnmoo, V mmiraxmfor s'rooxnonm, flswnnnn noomona'rron or swmm'n.

withjthe-re'sult, that the gas actuatedfhv the diaphragm and the other hows across section-of a -Fig. 4 showing a plan view of the elastic one m nivan:

j si nals, 1,417,598, as; 'ma 30, 192}, Serial Hes-21,150, filed s mmer, 1919. Application for v r I -qissufe fl 1ed Kgal( :h:2 6, 19 6- ,:N0.97,798.

chambers, 1 and I 2 is I controlled, twooutlet 'v'alves'll and 12, respectively. All said valvesare inadeas'tliskvalves, and each separate va-lveconsists of afpiece of leather Or the like 13 which is stretched over a reenient or elastic wire ring l h'as shown in Figs. 3 and i} so that the valve becomes light and works silently. The two inlet [valves 7 and 8 are secured respectively to the ends of a lt-wo-arni'edlfever'lti which tnrns ona pivot 15in such manner that when the valve 7 is closed, the'valveB isopen, and vice, versa. The valves '11 and 12 are supported in similar manner (mat-eve 18 turning on the pivot "17 otf'hat they will 'be'op'ened and closed alter vnatelyr The inlet; valves 7 and 8 close 1 against their seats from above, whereas: the

v e twozinner' valves 8, and 12 which control "the connection with the; measuring chamber 2,fare'- coup1ed together by means of a rod 19 which is preferahly'slightly elastic the middlepoint otwhich is connected with one end of a 'two a'rfrned lever '21 turning on the pivot '20; r'lojthe posite end of said lever one end of a'heli'ca spring 22 is secured the other endof which is secured to swannnn, A-SSIGNOB, 'ro AKTIEBonAen'r H the free 'endjbentdownwards of; a, one 7 ar 'nedzlever QBtiIinin'g on the ivot The said helical s ring ulls-"on be free ends of the two levers 1' and 23 in the direction towarfl'stheiraiies ofltjurni-ng 20 and24, resp'ec'tively. Consequently, the levers 21' and 2 r are o related thatii nes connecting their fulcra and the fining points respectively: of the spring, 'c'rossgon'e another in the limit osi t'ions of the: levers." neetedwith the diaphragm 4 hy ineans of a link 25, and supports a guide. plate 26 which cooperates with two hooks 27 turning on the pivot 20 and rigidly connected with the lever 21 in such manner that said plate prevents the lever 21 from turning until the lever 23 has turned so far upwards or downwardsthat the hooks 27 may pass the upper or the 3 I Q 100 The device'above described operates in the I lower edge of the plate.

following manner is closed, the valve 8 is open, the valve 11 is The lever 23 is con- .When the various'parts occupy the positions illustrated'in-t-he drawing the valve 7 inlet 5 thus con'nnunicates with the measuring chamber 2 beneath the diaphragm '4, Whilst the measuring chamber 1 communicates with the outlet 9. The gas then flows into the chamber 2 and forces the diaphragm 4 upwards, so that the gas in the'chamberl is driven out through the outlet 9. When the diaphragm moves upwards it brings alon the leven 23, which will thus turn up wards on its pivot 24. The spring 22 is thereby stretched. The lever 21 will remain in the position shown, however, as the guide plate 26 prevents the-hooks 27 from turning to the left in'Fig. 1, .until the lever 23 has moved so far upwards that thefhooks 27 may move past the lower edgeof said plate. The free end of the lever 23, that, is to say, its pointof attachmentto the spring 22, has then also mo ved sofar upwards that it is located above the turning pivot 20 0f the lever 21, consequently, when the plate26 releases the hooks 27 the lever 21 will rapidly turn in a countenclockwise directionin Fig. 1 through an angle which is dependent upon the stroke ofthe valves and theelasticityof the rod 19, The levers 16-and 18 are simultaneously turned in such manner that the valves 8 and 11 previously; open become' closed, Whereas the valves 7 and 1 2 previously closed are opened; ,The measuring chamber 2 which is filled with gas, isthus brought into communication through the Valve 12 with the outlet9, whi'le'the empty measuring chamber 1 is connected through the valve 7 to the inlet 5. The gas now flows into the chamber 1 and forces the diaphragm ,4 downwards bringing along the lever 23-untilthe hooks 27 can move past the upper'edge' of the plate 26, when the lever 21 and thus also all valves are again thrown back to the ositionsshown in Fig. 1;

In this mannert e measuring chambers 1 and 2 are alternately filled and emptied. On

- account of the spring 22 inserted between the the valve, the movements of diaphragm and place very rapidly "and at the valves take definite. moments of time which are accurately determined by the movements of the 6' plate 26fand thus also offtlie diaphragm.

If a suitable counter is attached to the lever [measuring chambers, I "separating said chambers, an inletto said 21 the measuring results indicated on such counter will be very reliable.

' I claim: I

" 1.In" a gas meter, the combination of two a movable diaphragm chambers, an outlet from saidchambers, valves between each of said chambers and said inlet and said outlet, a spring mechanism I between said "diaphragm l and said valvescomprising a lever and means whereby said lever .is connected with the diasecond lever, means whereby said phragm, a last named lever is connected with the valves, a spring connecting the said second levertoja point on the first'named lever remote from its fulcrum, said levers bein' so related that lines connecting their fu era and the fixing points respectively of the spring cross in the limit posione another tlons ofthe levers, and means for locking said second leveragainstmmoveme'nt during, the movement of the diaphragm until it reaches its limit positions of movement. Ina gas' meter, the combination of two measuring chambers, a movable diaphragm separating said chambers, "an"inlet"to said chamber, an outlet from said valves" between each of said chambers and said inlet and said outlet, a spring. mechanism between said diaphragm and said ialves comprising a lever and means whereby said lever isconnected with the diaphragnna guide 'member on said lever, a secondlever, means whereby said last named lever is connected with the valves,- aspring connecting the said second. lever to'a point on the first named lever"remote" from its fulcrum, said levers being so related thatlines connecting their fulcra and the fixing points respectively of the I spring cross one another in thelimit positions of the levers, and locking hooks connectedi'with said second' leverand cooperating with said guide member in such manner as to prevent said second'leve'r from turning until the lever first mentioned occupies itsflimit positions.

In testimony whereofI have hereunto affi xed my signature. I I

chambers,

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